Jenny uses 2 bags of potting soil for 6 potted plants.

2 answers:

6 0

Since you know 6 plants use 2 bags, you can put it into a ratio of bags/plants, which would be 2/6. you also know that 15 plants use x amount of bags, so to find the variable x you can make the two ratios equal.

2/6=x/15 Here you can cross multiply to get 6x=2*15 which is 6x=30. divide out the 6 to get x by itself to find that x=5.

So Jenny uses 5 bags for 15 plants

Dmitrij [34]3 years ago

5 0

You divide 6/2 and get 3 so 1 bag is 3 pots. Multiply by 5 and you get 5 bags for 15 plants

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The variance of a sample of 144 observations equals 576. the standard deviation of the sample equals?

elena55 [62]

When the variance of a sample of 144 observation is 576 then, the standard deviation of the sample equals 24

The variance is a measure of variability. It is calculated by taking the average of squared deviations from the mean. Variance tells you the degree of spread in your data set

Standard deviation is a statistic that measures the dispersion of a dataset relative to its mean and is calculated as the square root of the variance.

Given,

The number of samples = 144

The variance = 576

The standard deviation is the square root of variance

The standard deviation = $\sqrt{576}$ =24